Excavator



y 26, 1942- H. w. KLAGEs I 2,284,215

EXCAVATOR Filed Sept. 9, 1940 3 Sheets-Sheet l Ir m 51 3 H. Wfilages H. W. KLAGES May 26, 1942.

EXCAVATOR Filed Sept. 9, 1940 3 Sheets-Sheet 3 H WKlaQges- &

Patented May 26,1942

UNITED STATES PATENT OFFICE EXCAVATOR Henry W. Klages, Echo, Oreg. Application September 9, 1940, Serial No. 356,057 '3 Claims (01. 37-144) The present invention relates to improvements in excavators.

The primary object of the invention is to provide an excavator in the form of a scoop or grader,v including a scraper carried forwardly of. a tractor or other prime mover which will be raised from the ground upon which thescraper is operating when the prime mover is moved in a reverse direction.

A further object of the invention is to provide a land excavator such as a scraper, scoop or the like with shoes at the ends thereof or adjacent portions so that a reverse movement of the land scraper or leveler will be raised from the surface of the ground when being moved rearwardly.

A still further object of the invention is to provide link connections between a scraper and prime mover which are adapted to regulate the scoop or scraper with respect to the surface of the ground and which linkage may be controlled from the drivers seat of the tractor or prime mover.

A still further object of the invention is to provide a land excavator including a blade carried forwardly of a tractor or prime mover, which blade maybe moved toa scooping position or a scraping position;

Other objects and advantages of the invenside elevational view showing the arrangement of the linkage between the tractor and excavating blade;

Figure 3 is a front elevational view illustrating in detail the structural elements of the land scraper;

Figure 4 is a side elevational view illustrating in detail the manner in which the land scraper is raised from the surface of the land when the tractor is moved rearwardly;

Figure 5 is a longitudinal cross-sectional view taken on line 55 of Figure 1, looking in the direction of the arrows, illustrating the structural details of the scraper blade and the elevat ing shoes; and

Figure 6 is a horizontal cross-sectional view taken on line 66 of Figure 5, looking in the direction of the arrows, showing the connection between the tractor connection linkage and the including a frame structure .traction belts I2 passing over'toothed rollers l3 and I4 mounted forwardly and rearwardly of terminating portion 20 of the scraper.

scraper and also illustrating the pivotal connectionfor the elevating feet.

In the drawings, wherein for the purpose of illustrating the invention like reference characters will be employed to designate like parts throughout the same, the reference character [0- willgenerally be employed to designate a tractor ll supported by the tractor frame H. A motor I5 is provided on the tractor frame for propelling the tractor and a seat portion I6 is provided at the rear of the tractor.

The above structure is typical of present-day tractors generally used for propelling and drawing frame implements.

The invention comprises a transverse scraper blade I! mounted forwardly of the tractor l0 and :said blade is provided with a beaded upper edge 18 and is closed at the ends by walls [9. lower edge of the arcuately curved blade I! terminates in a relatively straight portion 20 The to which is removably secured a sharpened blade The cutter blade 2| is prothe relatively straight scoop portion 20. Bolts 24 are provided-at spaced intervals for locking the cutter blade 2| against the scraper portion 2ll.

displacement from Spaced inwardly from the end walls l9 are similarly shaped walls 25, between which may be positioned supporting wheels 26 held in place by stub axles 21 extending through the end walls [9 and spacedpartition walls 25.

Mounted on the rear arcuately curved surface of the scraper blade I! adjacent each end thereof are opposed flanges 2'! which extend from the beaded edge I8 to the relatively straight Mounted between the upper portions of the arcuately curved flanges 21' is a supporting bar 28 having the forward end bifurcated as at 29 so that the furcations will engage the inner walls of the arcuately curved flanges 21' so that a bolt 30 may extend therethrough and pivotally anchor thexsupporting bar 28,

Pivotally attached to the lower portion of the scraper l! and between the lower ends of the arcuately curved flanges 21 is a supporting bar 31 held in place by a bolt or the like 32 extending through the arcuately curved flanges. The supporting bars 3| extend in parallel relathe upper ,end of a link 31.

adj acent I the or blade.

tion on opposite sides of the tractor frame ll aperture 39 which is adapted to register with spaced apertures 4| formed in a segment shaped plate 40 carried on the upper side of the side supporting bar 3|. 7

When the link 31 is in its position shown in Figure 4, the scraper blade [1 will be rotated about the pivot point 32 so that the scraper blade may perform'a scooping operation. When the link 31 is extended forwardly 'so that the aperture 39 aligns with the forward aperture 4| whereby a bolt or the like may be extended therethrough, the scraper blade I! will be in position to'perform a scraping operation.

Secured to the upper portion of the scraper blade I! in spaced relation is a pair of angle bars 42, the lower ends of which are secured in place by welding or other fastening means upper beaded portion of the scrap- Pivotally mounted'between each of the channel bars 42 are adjusting bars 43, the forward portions of which are bifurcated as at 44 for receiving a pivot pin 45. Alternate apertures 46 are provided in the channel bars 42 whereby the front ends of the adjusting bars 43 may be moved toward or away from the end of the channel bars 42.

The rear ends of the adjusting bars 43 are provided with pivot pins 48 to which is pivotally attached the upper end of a crank arm 49 rigidly secured to an operatingishaft 50 rotatably carried by the tractor frame I I and held in place by suitable journal bearings 5|. Rigidly secured to the rotaryshaft 50 is a pulley 52 over which is trained an endless belt 53 which also encircles a pulley 54 mounted onone end of 'an operating shaft 55.

Supporting brackets 51 areprovided with foot portions 58 which are anchored to the tractor frame II by bolts or the like 59, while the upper portion of the brackets 51'are provided with bearing supporting surfaces 60 having bearing caps 6| for rotatably supporting the control shaft 55. Hand wheels 62 are provided on the control shaft 55 so that the operator may grasp the hand wheels with his right or left hand and impartrotation to the shaft 55 whereby the operating rotary shaft 50 will cause the crank arm 49 to swing in an arc to move the adjusting bars 43 either forwardly or rearwardly and thereby change the position of the scraper blade I! to the extreme location illustrated in Figures 2 and 4.

Mounted outwardly towards the ends of the scraper blade and adjacent each outer flange 21' is an arcuately curved plate 63' between,

which is pivotally mounted a lifting foot formed of a piece of strap iron having a base portion 64 and an angle portion 65 connected by an an,

gular portion 66. The free end of the base portion 64 as at 66 provides a ground engaging portion as shown clearly in Fig. 2. The strap iron foot is pivotally mounted between the outer arcuforwardly with the hand controls operated to.

shift the crank arm 49 forwardly so that the knife edge 22 will engage the ground surface and produce a scraping action. When the tractor and scraper have collected a large amount of earth, the motion of the tractor is reversed so that the feet 65 will engage the ground and raise the scraper upwardly as shown in Figure 4.

When it is desired to use the scraper as a V scoop, the crank arm 49' may be shifted to the position shown in Figure 4 whereby the cutting edge 22 will engage the ground and the wheel 26 will be raised off of the ground. In this manner, the scraper maybe propelled forwardly by means of the tractor l6 until the arcuately curved blade I! is loaded with earth, at which time the tractor may be reversed in its travel so as to cause the dumping of the scraper blade by the pivoted feet 65 engaging the ground and raising the scraper vertically as shown in Figure 4.

During normal forward travel of the scraper blade H, the raising and dumping feet assume the position shown in Figs. 2 and 5,'wherein they trail behind the scraper blade with the edge 66 dragging on the surface of the ground. Upon reversal of the tractor ID, the edge 66 digs into the ground and remains stationary while the continued rearward travel of the tractor causes the scraper I! to be raised above the surface'of the ground and in spaced relation thereto. a i

It is to be understood that the form of the invention herewith shown and described is to be taken as the preferred embodiment of the invention and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as claimed.

I claim:

l. A land scraping machine comprising a tractor, a pair of side bars having theirrear ends pivoted to thetractor and extending parallel on each side thereof, a scraper blade pivotally attached to the forward ends of the side bars, adjusting bars carried by the upper portion of the scraper blade adapted to extend rearwardly therefrom, manual means carried by the tractor for moving the adjusting bars forwardly or rearwardly, supporting wheels carried by the ends of the scraper blade and foot members secured to the rear of the scraper blade adapted to engage the ground whereby reverse movement of the tractor will elevate the scraper blade in spaced relation from the ground surface.

2. A land scraping machine comprising a tractor, parallel side bars pivoted to the tractor and extending forwardly thereof, a scraper blade pivotally attached at its lower end to the parallel side bars, adjusting bars pivotally attached to the upper portion of the scraper blade, means carried by the tractor for manually controlling the adjusting bars, ground wheels movable with the scraper blade and adapted for ground engagement when the scraper blade is in ground I otally'attached to the forward ends ofthe parallel side bars, supporting wheels at each end of the scraper blade operative for ground engagement when the scraper blade is in ground scraping position, and ground engaging foot members carried adjacent the ends of the scraper blade within the confines of the supporting wheels whereby said foot members may raise the scraper blade upon reverse movement of the tractor.

' HENRY W. KLAGES. 

